prosody
d7c80d23ed21
core/loggingmanager.lua

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core/loggingmanager.lua @ 3018:d7c80d23ed21

loggingmanager: Enable debug level for default console logging when 'debug' mode is enabled in the config.
author Waqas Hussain <waqas20@gmail.com>
date Thu, 06 May 2010 15:52:47 +0500
parent 2923:b7049746bd29
child 3019:6b2e4b581717
child 3043:1fadbb2e3ca0
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9
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10 local format, rep = string.format, string.rep;
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11 local pcall = pcall;
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12 local debug = debug;
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13 local tostring, setmetatable, rawset, pairs, ipairs, type =
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14 tostring, setmetatable, rawset, pairs, ipairs, type;
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15 local io_open, io_write = io.open, io.write;
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16 local math_max, rep = math.max, string.rep;
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17 local os_date, os_getenv = os.date, os.getenv;
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18 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
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20 if os.getenv("__FLUSH_LOG") then
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21 local io_flush = io.flush;
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22 local _io_write = io_write;
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23 io_write = function(...) _io_write(...); io_flush(); end
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24 end
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25
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26 local config = require "core.configmanager";
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27 local eventmanager = require "core.eventmanager";
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28 local logger = require "util.logger";
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29 local debug_mode = config.get("*", "core", "debug");
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31 _G.log = logger.init("general");
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32
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33 module "loggingmanager"
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34
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35 -- The log config used if none specified in the config file
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36 local default_logging = { { to = "console" , levels = { min = (debug_mode and "debug") or "info" } } };
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37 local default_file_logging = { { to = "file", levels = { min = (debug_mode and "debug") or "info" }, timestamps = true } };
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38 local default_timestamp = "%b %d %H:%M:%S";
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39 -- The actual config loggingmanager is using
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40 local logging_config = config.get("*", "core", "log") or default_logging;
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42 local apply_sink_rules;
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43 local log_sink_types = setmetatable({}, { __newindex = function (t, k, v) rawset(t, k, v); apply_sink_rules(k); end; });
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44 local get_levels;
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45 local logging_levels = { "debug", "info", "warn", "error", "critical" }
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47 -- Put a rule into action. Requires that the sink type has already been registered.
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48 -- This function is called automatically when a new sink type is added [see apply_sink_rules()]
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49 local function add_rule(sink_config)
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50 local sink_maker = log_sink_types[sink_config.to];
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51 if sink_maker then
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52 if sink_config.levels and not sink_config.source then
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53 -- Create sink
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54 local sink = sink_maker(sink_config);
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55
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56 -- Set sink for all chosen levels
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57 for level in pairs(get_levels(sink_config.levels)) do
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58 logger.add_level_sink(level, sink);
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59 end
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60 elseif sink_config.source and not sink_config.levels then
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61 logger.add_name_sink(sink_config.source, sink_maker(sink_config));
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62 elseif sink_config.source and sink_config.levels then
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63 local levels = get_levels(sink_config.levels);
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64 local sink = sink_maker(sink_config);
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65 logger.add_name_sink(sink_config.source,
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66 function (name, level, ...)
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67 if levels[level] then
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68 return sink(name, level, ...);
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69 end
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70 end);
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71 else
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72 -- All sources
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73 -- Create sink
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74 local sink = sink_maker(sink_config);
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75
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76 -- Set sink for all levels
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77 for _, level in pairs(logging_levels) do
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78 logger.add_level_sink(level, sink);
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79 end
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80 end
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81 else
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82 -- No such sink type
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83 end
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84 end
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85
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86 -- Search for all rules using a particular sink type, and apply
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87 -- them. Called automatically when a new sink type is added to
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88 -- the log_sink_types table.
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89 function apply_sink_rules(sink_type)
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90 if type(logging_config) == "table" then
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91 for _, sink_config in pairs(logging_config) do
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92 if sink_config.to == sink_type then
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93 add_rule(sink_config);
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94 end
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95 end
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96 elseif type(logging_config) == "string" and (not logging_config:match("^%*")) and sink_type == "file" then
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97 -- User specified simply a filename, and the "file" sink type
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98 -- was just added
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99 for _, sink_config in pairs(default_file_logging) do
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100 sink_config.filename = logging_config;
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101 add_rule(sink_config);
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102 sink_config.filename = nil;
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103 end
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104 elseif type(logging_config) == "string" and logging_config:match("^%*(.+)") == sink_type then
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105 -- Log all levels (debug+) to this sink
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106 add_rule({ levels = { min = "debug" }, to = sink_type });
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107 end
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108 end
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109
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111
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112 --- Helper function to get a set of levels given a "criteria" table
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113 function get_levels(criteria, set)
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114 set = set or {};
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115 if type(criteria) == "string" then
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116 set[criteria] = true;
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117 return set;
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118 end
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119 local min, max = criteria.min, criteria.max;
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120 if min or max then
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121 local in_range;
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122 for _, level in ipairs(logging_levels) do
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123 if min == level then
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124 set[level] = true;
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125 in_range = true;
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126 elseif max == level then
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127 set[level] = true;
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128 return set;
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129 elseif in_range then
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130 set[level] = true;
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131 end
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132 end
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133 end
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134
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135 for _, level in ipairs(criteria) do
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136 set[level] = true;
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137 end
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138 return set;
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139 end
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140
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141 --- Definition of built-in logging sinks ---
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142
1080
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143 -- Null sink, must enter log_sink_types *first*
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144 function log_sink_types.nowhere()
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145 return function () return false; end;
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146 end
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147
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148 -- Column width for "source" (used by stdout and console)
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149 local sourcewidth = 20;
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150
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151 function log_sink_types.stdout()
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152 local timestamps = config.timestamps;
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153
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154 if timestamps == true then
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155 timestamps = default_timestamp; -- Default format
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156 end
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157
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158 return function (name, level, message, ...)
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159 sourcewidth = math_max(#name+2, sourcewidth);
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160 local namelen = #name;
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161 if timestamps then
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162 io_write(os_date(timestamps), " ");
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163 end
1031
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164 if ... then
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165 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", format(message, ...), "\n");
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166 else
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diff changeset
167 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", message, "\n");
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168 end
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169 end
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170 end
1021
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171
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172 do
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173 local do_pretty_printing = not os_getenv("WINDIR");
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174
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175 local logstyles = {};
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176 if do_pretty_printing then
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177 logstyles["info"] = getstyle("bold");
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178 logstyles["warn"] = getstyle("bold", "yellow");
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179 logstyles["error"] = getstyle("bold", "red");
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180 end
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181 function log_sink_types.console(config)
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182 -- Really if we don't want pretty colours then just use plain stdout
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183 if not do_pretty_printing then
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184 return log_sink_types.stdout(config);
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185 end
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186
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187 local timestamps = config.timestamps;
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188
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189 if timestamps == true then
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190 timestamps = default_timestamp; -- Default format
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191 end
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192
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193 return function (name, level, message, ...)
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194 sourcewidth = math_max(#name+2, sourcewidth);
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diff changeset
195 local namelen = #name;
1892
adc0c80413ee loggingmanager: Whitespace fix
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196
1078
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197 if timestamps then
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198 io_write(os_date(timestamps), " ");
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199 end
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diff changeset
200 if ... then
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201 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", format(message, ...), "\n");
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diff changeset
202 else
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diff changeset
203 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", message, "\n");
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diff changeset
204 end
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diff changeset
205 end
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diff changeset
206 end
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diff changeset
207 end
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208
1117
360ec48ea780 loggingmanager: File log sinks react to reopen-log-files event
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diff changeset
209 local empty_function = function () end;
1031
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diff changeset
210 function log_sink_types.file(config)
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diff changeset
211 local log = config.filename;
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212 local logfile = io_open(log, "a+");
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diff changeset
213 if not logfile then
1117
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diff changeset
214 return empty_function;
1031
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215 end
1117
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diff changeset
216 local write, flush = logfile.write, logfile.flush;
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diff changeset
217
360ec48ea780 loggingmanager: File log sinks react to reopen-log-files event
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diff changeset
218 eventmanager.add_event_hook("reopen-log-files", function ()
360ec48ea780 loggingmanager: File log sinks react to reopen-log-files event
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diff changeset
219 if logfile then
360ec48ea780 loggingmanager: File log sinks react to reopen-log-files event
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220 logfile:close();
360ec48ea780 loggingmanager: File log sinks react to reopen-log-files event
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parents: 1101
diff changeset
221 end
360ec48ea780 loggingmanager: File log sinks react to reopen-log-files event
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diff changeset
222 logfile = io_open(log, "a+");
360ec48ea780 loggingmanager: File log sinks react to reopen-log-files event
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parents: 1101
diff changeset
223 if not logfile then
360ec48ea780 loggingmanager: File log sinks react to reopen-log-files event
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parents: 1101
diff changeset
224 write, flush = empty_function, empty_function;
360ec48ea780 loggingmanager: File log sinks react to reopen-log-files event
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parents: 1101
diff changeset
225 else
360ec48ea780 loggingmanager: File log sinks react to reopen-log-files event
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diff changeset
226 write, flush = logfile.write, logfile.flush;
360ec48ea780 loggingmanager: File log sinks react to reopen-log-files event
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parents: 1101
diff changeset
227 end
360ec48ea780 loggingmanager: File log sinks react to reopen-log-files event
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parents: 1101
diff changeset
228 end);
1031
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diff changeset
229
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230 local timestamps = config.timestamps;
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diff changeset
231
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parents: 1522
diff changeset
232 if timestamps == nil or timestamps == true then
1078
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233 timestamps = default_timestamp; -- Default format
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diff changeset
234 end
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235
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diff changeset
236 return function (name, level, message, ...)
1078
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diff changeset
237 if timestamps then
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238 write(logfile, os_date(timestamps), " ");
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diff changeset
239 end
1031
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diff changeset
240 if ... then
ec013f93de81 core.loggingmanager: Refactoring, converted to a module. Now possible to register additional sink types (think syslog) from other modules
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parents: 1024
diff changeset
241 write(logfile, name, "\t", level, "\t", format(message, ...), "\n");
ec013f93de81 core.loggingmanager: Refactoring, converted to a module. Now possible to register additional sink types (think syslog) from other modules
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parents: 1024
diff changeset
242 else
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243 write(logfile, name, "\t" , level, "\t", message, "\n");
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244 end
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245 flush(logfile);
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246 end;
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247 end
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248
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249 function register_sink_type(name, sink_maker)
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250 local old_sink_maker = log_sink_types[name];
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251 log_sink_types[name] = sink_maker;
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252 return old_sink_maker;
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253 end
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254
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255 return _M;